Microbial Metabolis2

Microbial Metabolis2 - bond = The energy for anabolic reactions may be obtained by hydrolysis of ATP to ADP phosphate The metabolic reactions of

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Microbial Metabolism - Activities and regulation of enzymes The term metabolism refers to the sum of all chemical reactions within a living organism. Metabolic activity can be dividied into two classes of reactions: - Catabolic reactions release energy and are employed for breaking down nutrients = Many catabolic reactions are hydrolysis reactions = An example of catabolism is hydrolysis of proteins to individual amino acids - Anabolic reactions require energy and are used in synthesizing molecules needed by the cells = Many anabolic reactions are dehydration synthesis reactions = An example of anabolism is synthesis of proteins from amino acids - Adenosine triphosphate (ATP) serves as a link between catabolism and anabolism (Tortora et al., Figure 5.1) = Catabolic reactions may be linked to dehydration synthesis of ATP from ADP and free phosphate; the energy released in the catabolic reaction is "stored" in the ADP-P covalent
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: bond = The energy for anabolic reactions may be obtained by hydrolysis of ATP to ADP + phosphate. The metabolic reactions of living systems are catalyzed by enzymes- By a catalyst, we we mean something that increases the frequency of productive collisions in a chemical reaction- Enzymes, most of which are large globular protein molecules, are highly specific, affecting only certain substrates and certain chemical reactions- Many enzymes consist of both a protein portion, the apoenzyme, and a nonprotein cofactor; together, these make up a holoenzyme (Tortora et al., Figure 5.2) = If the cofactor is an organic molecule, it is called a coenzyme; most of the compounds that we refer to as "vitamins" act as coenzymes or components of coenzymes...
View Full Document

This note was uploaded on 01/23/2012 for the course MCB MCB2010 taught by Professor Smith during the Fall '09 term at Broward College.

Ask a homework question - tutors are online